It's been 25 years since Marty McFly traveled back in time on Oct. 25, 1985, and it makes you wonder… they must have saved the clock tower by now, right? Even if they haven't, one thing still works gangbusters: "Back to the Future."

During an era of raunchy teen sex comedies like "Porky's" and "Weird Science," director Robert Zemeckis made a movie that was both timelessly wholesome and subtly irreverent, a comedy-adventure that fires on all cylinders. From the opening moments of Marty (Michael J. Fox) in Doc's (Christopher Lloyd) lab blowing out the world's biggest amplifier, we know we're watching a work of off-kilter brilliance.

The concept of a teen traveling back in time only to wind up in an oedipal love triangle with his parents took a lot of nerve, but watching the now-classic movie years later it's remarkable how a conceivably squirm-inducing idea could be pulled off with such easy-breezy charm. Just watch Fox's face during any scene where he's confronted by Lea Thompson's Lorraine and the sheer anxiety rippling through him at seeing his haggard mother turned into a seething teen sexpot -- priceless.

Lloyd as Doc Brown is the Eighth Wonder of the World, a madcap scientist whose every movement has enough propulsive energy to power the Hoover Dam. Writers Zemeckis and Bob Gale's greatest miracle is making the relationship between laid-back teen Marty and borderline-psychotic old man Doc not only believable, but in the final act genuinely touching. Great Scott!

Of course Marty and Doc's adventures weren't over, and "Back to the Future" Parts "II" and "III" are dazzling in their own right. "Part II" took what could have been a routine rehash and made the quantum leap of using time travel to go all Rosencrantz and Guildenstern on us, diving into the original film's 1955 from a whole new angle.

The third film is a humdinger of a western romp where Doc finds Mary Steenburgen's Clara, a mate so perfect for him you'd think they had Match.com in 1885. We also see Marty trying to prove Clint Eastwood ain't "the biggest yellowbelly in the west." Somewhere in between you've got hoverboards, Indians, and "eat lead, slackers!"

The new Blu-ray set of the trilogy will give the generation raised on X-Box and iPods a chance to experience "Back to the Future" for the first time, and even though Marty may listen to Van Halen and drink Pepsi Free, he hasn't aged a day.

Extras! The set includes pristine new transfers with loads of bonus features, including a six-part retrospective documentary and that never-before-seen footage of Eric Stoltz as Marty which has been locked somewhere below the Earth's crust for two decades.